Mill



Aug. 3, 1943.

M. S. SISULAK MILL Filed May 29, 1941 'IM/ENIUR Maj/ 5. 5.5% EIY fi LQ- commonly used for the reduction or'co mminution v municates' directly with the atmosphere; and-the of material suchas feed, minerals, or the like. othe'r'of which communicates directly withf the ferred to comprises generally an upright drum" 5 to provide for a communication: between "the having upright, spaced side walls, between which chamber'and the atmosphere. T r

' with a cylindrical screen for pulverizing or retion will appeariromitheifollowingdetailed-de terial reduced in the"housin'g.-- The-discharge' of-"a conventionalforrn, portionsoi'thefliousing chamber isassociated" with means for movingstructure being'brokenaway; and V the material and for discharging the rnaterial Figure '2-is an end viewof the same structure 7 in o stor e bins or the like. The present -in -i taken substantially'on the linel 2421M Figure 1;.'. Vention'is concerned particularly with amill in Themillichosen for the purposes-of: illustrawhich the discharge meansis inthe 'form of a tion isbff thetype commonly used -for milling.; means such as a' blower -fan having a suctionfeed for live stock? Asshown in the drawing connectionwith the discharge chamber. 1 themill' comprises =g'en erally a lower supporting? sagewa'y between the discharge'chamberandthe- -As bestshown in Figure 2, the drum ll in V suction means." Ordinarilyone side of-the' dis-1 3o cludes a pair of spaced, upright sidewalls 113', Charge ha er is Open to the atmosphere so joined at their upper' circular portions. by ang that-the suction means m'ayhave a directjdrafts. arcuate wall 15. forming the upper portion of: h he --h 1nber- 'h s b en: the drum. n perforated-reducingscreen [Sis found, however, that reduced material can and disposed within thedrum between the walls 15,; does pile up in the discharge chamber to suoh 'an' 35, and forms generallya continuation of the curva-.: extent that itclos'es off the air inlet i opening, ture of the arcuate Wal1il5.' The wall I5 extends with the result that the suction meansi fails to substantially tangentially to one'side' of lthedru m remove the reduced material 1 .7 to Jaipoint where it meets the Jfeeding means 7 The p t i e t o contemplates: :and; has E2} The screen it. is discontinuedia substantial' for its principal object the; provision of .means 71 4() distance about its periphery and is spaced from for eliminating thegdifiicultiesreferred'to above, the inside of'the Wall l5 toipr'ovid'e a feed inlet t s an according to a pref-erred form f throat," generally indicated at; 117.: A. sliding door Y; the-inve t on, taking the form of J an auxiliary i8 is adapted to be moved intoor outrof closed or relief air-inlet communicating with 0216 51101 position tov close oropenthe'feed inlet'thrjoat' ll tion-means, and adapted torfacilitate the :-re-.. 45 to'the feeder means l2. 'Ijhis door is shownin moval of reducedmaterial: from the discharge?v closed position inthedrawingsh Aportion of. chamber or outlet. a l 1 l .1 the'wall l5 immediatelyadjacent.thefeedjthroat A important. objectis to provide this-lmea i '1 is provided with ,arperforated element .lfi'to in the form of adivider mem erv sep r t zthe. provide means,for'admit ting air to theldrumfl air inl t op n n i t two parts,' ioiwhich- 5'0 for-purposesto,be hereinafter described; by-passes the discharge chamber andpreierablv The:opposite walls Mcserve'tojournal-therein communicatesywith lthells q me n l h amaterialreducing'means in the formjof arotor point of connection of the suction and; 20 ofthehammer type; ThiS rotor may be driven the discharge chamber. 7 t 7 anyj suitable means v.such; asthe-{pullet 2],

Patent d Au 3, 1943 p i v.

l TED TA'i-TE IS PAT NT-1 5 ;MichaelSrsisulakybhicago, lll assignor to InternationalHa rveste1- Company, a. corporation of New: ler se 1 Application May 29, 1941, 'Seria1NoI395,781 V w r c l i inc fi f l r v l ...a Y This invention relates to' a mill of the-type l plying suction in two streamsfone o fw'hi ch com- 'A conventional form ofmill of the type r'edischarge chamberfit being'also an expedient is disposed a cylindrical reducingscreen, these 7 Still another obje'ctis toprovide; in coinbiha parts and other enclosing w'alls forminga ma-- tion with-the 'means referred to above; deflecteterial reducing chamber or housing in which is ing means for 'deflectin'g the' reduced" material- I} carried reducing-mechanism. This mechanism 1 away fro'm the air inlet-opening whichis' open 1 usually takes the form'ofia rotorhaving swi-n'g to the chamber. 1 y 1 l able members thereon-adaptable to-jcooperate' -Other'and'r'nore' specificobjectsf'ofthe-driven;

ducing' the material.'- A-lower' portionofthe" scription taken in conjunction with 'theJa'ccoiridrum is provided Withadischarge outlet in the r1 panyingsheet'ofi drawings in which: I 11 form of a chamber adapted to receive the ma- Figure 1 is a side -elevational yaw; of a mill I o 'In mills of thetype just referredto-consider 5 5 casing'lfl including'adrumTlL- nd a fedjjfllet le dific y h s en D r e'h in-the per means [2; v The null itself'is supportedona pair: 1 tion of the suction means, because of the tendof skids 13; thus elevatin the. lower. portion of ency of the reduced material to pack at thepa's v the mill slightly abovethe ground. J

V;;'Another-iobject vi s toj provlde rneans -for ap s-and; includesa shaft which, extends.:routsidejo f,

ioreign particlesxscattered'on thegroundi,

, housing includes a conveyer or suction conduit I 24 which communicates through an opening 25 in one of the walls H with a chamber or compartment 26. This chamber is adapted to receive reduced material through. thescreen IS. A deflector plate 2] is carried inside thelower portion or; the housing; Iii andprovidesrmeansj; for deflecting reducedmaterial toward the open; 10

mg 25 which communicates with the suction conduit '24. The material is drawn from the] chamber 25 by suction means and is discharged through a discharge conduit in th e housing 23,.

The construction just describediis-'genera-Hy conventional. The operation of such a convenv tional mill has heretofore been,subject,to..the; difiicultiespointedout above, the greatest difficulty being the packing of the reduced material ceereazoia heopemne n' hen rt ulan o m; 1 l ill a ed. t w l e noted; that? a: second opening; 2 9 is: provided" in the other wall. I this p nin being sub a t a y; na in z'n nt. with theopening 25g. The purposeoi this-ropenmg is toprovide an air-,inletppenii gtotheatrnos;

pherel-outside of the mill, so that a directdraft or suctionmay be created transversely of the, drumthrough thereducing chamber; 26: The cle-. flectonlplate 2,1 serves to, prevent; accumulation; 0 of reduced material adjacent the opening; 29;, However, it has been found that amore; efi'i ient means was required before theymilLwouldjfunc-j tion roperly, Accor in 1 o, the n esentinvem tion this meanstakes-the former a1i ;auxiliary or relie f'conduit, "indicatedgenerally; in the;draw-' ingbyf the numeral. 30.: I "As will be, seen from anw examination or the drawing, ,thisgconduit is pro-,, vided' by the provision: ofaplate .or dividin gelement;,3 I, which is; disposed transversely; across; the; dischargeichamberrm',, The.- plate; 571. 0. arranged; that it: divides ,eachof: the: openings 5 2 5 andl ZS-into..tworpartsgthe.upperrparts of-ieach; of; which are;in,direct;communicatiomwith;

the ,t

discharge chamber. 2 6;-while thelowergparts dicated generally.at:' and 29;;respectively-,:;d0 :e not communicate directly with; thatchamber;

side the drumhousing. I0; In thej-preferredpconj struction illustrated; the; conduit 30; is completedi" by a;floor vportion 32s. ltawilllbe understbodyof course, that this portion ;is not;absolutely;neces;-.. saryst an efficient functioning of. the'means: just described; Itzhas been;provided inztheizpre: ierred: construction, however, to provide an .-air-; inlet. outside. the mill, whereas; inrthe. absence; of such iioor, the suction meansiwould; dravw in"; air frcm directly-below thelplate13i; a.t which i point the air.wo.u1d have a; tendency. to, pichiup It: will. beunoted from an examinat'cn of. the] drawings that. the portionlSZrof-the. openingg25i 6 is .lccatedsubstantiaH-y;immediately. at .-'the junce tion between the conduit 24f. iandi'th e discharge, chamber- 26'; -Accordingto this.featurei of the; invention, air maybe drawndirectly through the;

, opening 25' so-that.a-slightsuction isacreatedion whatever: material happens to be piled up atitlie 7 opening- 255 Such suction. in' facti eliminates:

open. In any event, the plate 3| prevents reduced material from clogging that portion of the opening 25 designated at 25, which portion, as has been seen, is absolutely separate from the discharge chamber 26.

As shown in Figure 1,.the lower part of the housing I0 is provided with a pair of deflector members 33 which converge from opposite sides of the screen .I 6 to the: receiving chamber 2 6.

-In' the operation of the mill just described, material is supplied to the drum l I through the feeder means [2, the sliding door l8 being at that time moved to open position. The material is reduced in the conventional manner by the action 1, of the-rotopZflon the screen IS, the reduced *material'dropping-downwardly to the receiving chamber 26Z Th8 suction fan 22 draws off the reduced materialand discharges it through the discharge conduit 23. A constant supply of air tothe suction means is insured through either of the open portions 29;:0 29, In the event that the; rotor housingbecomes choked. with 'material thus shutting ofi, air w-hich may be drawn; through the-throat IT, a supply; of incoming; air-is insured bythe provisionfof; thez per forated; inlet vplate l 9,in1 the upper part; of th e wall 5 I 5 adjacent the junction between the 'drum: I l ;and,the; feedenmeans-J 2. Itwill thus be seen-,- 7 that therehas been provided a: preferred form; of; construction ,in which ai constant" supply;v Oi. ands-insured to pointsinthe mill vital toithe; efficient, operation .of the mill. V r Although :thejpregoing;specification and draw-' ing s reier-to a mill of the type .usedinreclueing feed or 'ther'like, it will be understoodthat thei inv ntion c at s he ov cnc mammgfoing; features in other types of millsandin. material reducing, machines or. apparatus, for; use in .reducing or comminuting; other types of -ma;ter ia-1.St v V 7 Itflwill be further: appreciated that only a-pre ferredjorm'of; construction; has, beenil1u strated.= and described and that numerous,- modifications; and alteration ssgmayr bepmflde therein without departing from :the 1 spirit and scopegoi the invention asi defined-:inthe' appende What-,isclaimedis: .Q a 1; ,In;a mill ;in,cluding; a reducing-mousing, combination .with; the:,,hcusina f compartment. for; 'receivinsereduced: material; aid-1 mpa e ment'havingz-an airiinletfand agdischarge outlet;

a1 baffle. within the; compartment; for; deflecting; reducemmaterialraway:from-the; air inlet as-Jthe. materialoenters the compartment, suctionlmeana connected to; thewdischarger outlet for removing;-

reduced material fronrth'e; comp artment,., a; seer, ondzair; inletseparate, from and subjacent the; compartment, and meanszformingzazcommunica t tionbetweenthe'second air;in let;and: thesuction meansaand byepassingthe-compartment;where by material fromzthe: compartment is: excluded.- from said lastxnamed means; v: :s 1 1 l 2; A: mill-t comp ising (arch-um 1 havingunfi ht; spaced walls andi'as cylindrical 'reducingiscreent.

material, a plate disposedtransversely;across-the;

' drum walls below the screen ands-providime:a-

material receiving. chamber," lone.- oi 17118:: walls having an opening disposed zthereinxso;thatathe. platedivides said opening .='into ,tWOi parts; with i one part 7 outside the confines r of the receivingi chamber and; open: to atmosphere, and: suction-.3 I means including a conduit: conne'cted over said: opening for removing materiahfrom thereceiv ing chamber,- whereby- ..the suction conduitfis open to the chamber and to the atmosphere outi v side the chamber.

3. In a mill having reducing housing the' combination with the housing oia discharge, chamber including walls for receiving reduced material, one-0f said walls having a discharge opening, suction means associated 'With the chamber through said dischargeopening for rea moving reduced material from the chamber, one

of said walls having anair i'nlet opening norsuction means throughthe discharge chamber 'a'ndthe other subjacent thereof and communicating directly with the suction' means separate from and Icy-passing the discharge chamber, a

partition between said air streams for excluding reduced material from the secondair stream.

. MICHAEL S. SISULAK. 

